[BRLTTY] BRLTTY freeze when switching workspaces in XFCE with Modular Evolution display

[Halim Sahin]

Hello,

I would like to report an issue with BRLTTY and ask for advice.

At the office I am using Ubuntu 24.04 LTS. The Braille display is a
Modular Evolution. The desktop environment is XFCE. BRLTTY is running as
a user process for the terminal, using the a2 screen driver.

Only with this specific combination I experience the following problem:
when switching workspaces in XFCE, BRLTTY freezes. To restore Braille output, I have to switch to a text console and restart the main BRLTTY process.

This issue is not new. I already had the same problem with this Braille display on the previous Ubuntu LTS version as well. Unfortunately, the problem cannot be reproduced reliably.

My questions are:

Is anyone else using this combination and experiencing similar issues?

Which debug levels should I enable in brltty.conf to generate meaningful
logs for debugging this problem?

I suspect that the issue might be related to the Braille display itself,
since with Ubuntu 22.04 LTS and a BrailleStar 80 I do not have these
problems. However, this is only a suspicion.

Any help or hints would be greatly appreciated.

Best regards
Halim